void maybe_add_subtitle ();
boost::shared_ptr<AudioBuffers> deinterleave_audio (uint8_t** data, int size);
AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle
void maybe_add_subtitle ();
boost::shared_ptr<AudioBuffers> deinterleave_audio (uint8_t** data, int size);
AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle